Saladin/Arabia broken menu item for purchasing buildings with Faith

(1.0.0.26)
I am playing as Saladin, whose power allows purchasing Religion-gained Faith buildings in Holy districts for 10% of their usual cost. In my current game, I have 350 faith, and the Gurdwara costs 30. When I try to purchase it, the option is invalid, and the tooltip states: "Not enough Faith accumulated to purchase this." I can construct it with production, so I have all other requirements satisfied.

This bug is reproducible. Saving, exiting, and loading the game did not fix it, nor did exiting the application entirely and reloading the game.

Attached Files:

Yeah, it appears to insist that the Mosque isn't purchaseable (for the stated 30 faith cost) until you have enough faith accumulated to pay the full, undiscounted price (300 faith). But once you have the 300 faith, it does only charge you 30 faith, so at least that part is working correctly.

I'm playing as Arabia. I''ve built a holy site, shrine, and temple in Homs. I'm trying to buy my religious building, the Mosque, with faith. It's 35 faith
I have 140 faith.
However, when I mouse over the Mosque button, it's grayed out, and it says "not enough faith accumulated to purchase this."
Is it a glitch with the Arabian UA or something, that's messing this up?
I kept on playing for a few turns until I had 190 faith, and still couldn't buy the Mosque.
So, what's happening?

Attached Files:

I almost never update this sig, so don't expect it to be all that accurate.
I got Brave New World right before school started. So far, I've played a Venice(Diplomacy) game on Emperor, a Korea(Science) game on Immortal, and am currently in the midst of another Venice(Diplomacy) game on Deity.

Attached Files:

I almost never update this sig, so don't expect it to be all that accurate.
I got Brave New World right before school started. So far, I've played a Venice(Diplomacy) game on Emperor, a Korea(Science) game on Immortal, and am currently in the midst of another Venice(Diplomacy) game on Deity.